Single-Use dialogues pop up fullscreen, don't follow User Preferences for Geometry

(Is this a bug or a feature of the new release?)

Temporary dialogues/pop-ups (i.e. SVG/PNG imports, extension settings etc.) open in full screen every time, ignoring the window geometry settings in Preferences.

Steps to reproduce:

• open Inkscape
• import PNG
• Pop up appears in full screen
• Resize window > close window
• Open Preferences > Interfaces > Windows > Save window geometry
• Save document > reopen
• Import PNG
• Pop up opens in full screen

(can be reproduced with all temporary pop-ups)

What happened?

Pop up opened in full screen

What should have happened?

Pop up should have reopened in the resized dimensions.

Inkscape Version and Operating System:

GLib version:     2.70.5
GTK version:      3.24.33
glibmm version:   2.60.0
gtkmm version:    3.24.5
libxml2 version:  2.9.12
libxslt version:  1.1.34
Cairo version:    1.17.6
Pango version:    1.50.6
HarfBuzz version: 2.9.1

OS version:       macOS 10.14.6 (Intel)